Battery housing for a vehicle battery

Abstract

A battery casing for a transportation vehicle battery having a casing part with a peripheral sealing flange and a casing cover with a seal that extends around the periphery and seals a contact edge formed between the sealing flange and the casing cover, wherein a zero gap region is formed between the casing cover and the sealing flange radially outside with respect to the seal and a liquid seal is introduced into the zero gap region.

The invention claimed is: 
     
       1. A battery casing for a transportation vehicle battery, the battery casing comprising:
 a casing part having a peripheral sealing flange; and 
 a casing cover that includes a seal extending peripherally around the casing cover to compressibly seal a contact edge formed between the sealing flange and the casing cover, 
 wherein the casing cover and the sealing flange extend without engagement with each other radially inside with respect to the seal and a zero gap region is formed between the casing cover and the sealing flange radially outside with respect to the seal, and 
 wherein a fluid seal is arranged at the zero gap region radially outside with respect to the seal. 
 
     
     
       2. The battery casing of  claim 1 , wherein the fluid seal fills the zero gap region. 
     
     
       3. The battery casing of  claim 1 , wherein the seal is a foam seal. 
     
     
       4. The battery casing of  claim 1 , wherein the casing cover is joined to the sealing flange at a plurality of attachment sites. 
     
     
       5. A method for producing the battery casing of  claim 1 , wherein the fluid seal is applied to the casing cover and/or to the sealing flange in the zero gap region prior to the casing cover being joined to the sealing flange. 
     
     
       6. The method of  claim 5 , wherein a paste sealing medium is applied as the fluid seal. 
     
     
       7. The method of  claim 5 , wherein the fluid seal is applied to the casing cover and/or to the sealing flange. 
     
     
       8. The method of  claim 5 , wherein the fluid seal is distributed into the zero gap region while the casing cover is being joined to the sealing flange. 
     
     
       9. A transportation vehicle battery of an electrically driven or electrically drivable transportation vehicle, the transportation vehicle battery comprising the battery casing of  claim 1 . 
     
     
       10. The battery casing of  claim 1 , wherein the seal is compressibly resilient for sealing between the casing part and the casing cover. 
     
     
       11. A method for providing corrosion protection for a zero gap region between a casing cover and a sealing flange of a casing part of a battery casing wherein the casing cover includes a seal extending peripherally around the casing cover to seal a contact edge formed between the sealing flange and the casing cover, wherein the casing cover and the sealing flange extend without engagement with each other radially inside with respect to the seal and a zero gap region is formed between the casing cover and the sealing flange radially outside with respect to the seal, and wherein a fluid seal is arranged at the zero gap region radially outside with respect to the seal. 
     
     
       12. The method of  claim 11 , wherein a paste sealing medium is applied as the fluid seal. 
     
     
       13. The method of  claim 11 , wherein the fluid seal is applied to the casing cover and/or to the sealing flange. 
     
     
       14. The method of  claim 11 , wherein the fluid seal is distributed into the zero gap region while the casing cover is being joined to the sealing flange. 
     
     
       15. The method of  claim 11 , wherein the fluid seal fills the zero gap region. 
     
     
       16. A battery casing for a transportation vehicle battery, the battery casing comprising:
 a casing defining a peripheral sealing flange; 
 a casing cover including a seal extending along the sealing flange for engagement with the casing to enclose a seal gap formed between the sealing flange and the casing cover, wherein the casing cover and the sealing flange extend without engagement with each other radially in from the seal gap and the casing cover and the sealing flange define a zero gap region radially out from the seal gap, the zero gap region defining smaller spacing between the casing and the casing cover than the seal gap; and 
 a fluid seal arranged at the zero gap region radially out from the seal gap. 
 
     
     
       17. The battery casing of  claim 16 , wherein the seal fills the zero gap region. 
     
     
       18. The battery casing of  claim 16 , wherein the seal is a compressible seal. 
     
     
       19. The battery casing of  claim 16 , wherein the fluid seal is distributed into the zero gap region while the casing cover is being joined to the sealing flange. 
     
     
       20. The battery casing of  claim 16 , wherein the seal is compressibly resilient for sealing the seal gap.